Noah Schnapp Wishes Millie Bobby Brown a Happy Birthday With the Sweetest Photos

See some of the best friendship moments from the 'Stranger Things' costars.

Noah Schnapp and Millie Bobby Brown don't just play good friends on TV—they're also real-life BFFs, and we can't get enough of their sweet relationship.

Schnapp, 18, put their wholesome friendship on display in a new series of Instagram photos, which he shared in honor of Brown's 19th birthday on Sunday, Feb. 19.

"Happy birthday to my partner in crime for life," he captioned the carousel post, which began with a current photo of the Stranger Things co-stars taken in black and white, with Brown resting her head on her close pal. The second pic showed the pair posing for the camera while dining at a restaurant, with the Enola Holmes actress sweetly holding on to Schnapp's arm.

The next slide featured a major throwback of the duo from 2017, taken when they were probably around the age of 12. The iconic photo shows Brown and Schnapp at the SAG awards, the year Stranger Things was crowned Best TV Ensemble Cast. In the snap from the event's after party, Brown is seen double-fisting with baskets of french fries and making a crazy face, while Schnapp, holding his own french fries, appears just absolutely jazzed to be there.

The final photo was perhaps the most heartfelt, as the twosome was seen taking a nap on what looked to be a plane, while cuddled under the same blanket and facing each other in their sleep.

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"I love you so much?? @milliebobbybrown," Schnapp added in the post, which earned a comment from Brown, who wrote, "love you best friend ??."

Jamie Campbell Bower, who plays the villainous character of Vecna in the show, also fawned over his cast mates' adorable friendship, leaving a "??" emoji in the comment section.

Brown also shared her own Instagram post on Sunday to mark birthday number 19 with a photo of herself seemingly enjoying a celebratory night out.

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"howdy 19 ??" she captioned the b-day post, which Bower also commented on, writing, "Yes mills. ????????."

Reese Witherspoon also chimed in to tell Brown, "Keep shining bright!! ??."

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